CN206002050U - A kind of frost zone thickness monitor device - Google Patents
A kind of frost zone thickness monitor device Download PDFInfo
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- CN206002050U CN206002050U CN201621073276.3U CN201621073276U CN206002050U CN 206002050 U CN206002050 U CN 206002050U CN 201621073276 U CN201621073276 U CN 201621073276U CN 206002050 U CN206002050 U CN 206002050U
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- 238000012544 monitoring process Methods 0.000 claims abstract description 42
- 239000002184 metal Substances 0.000 claims abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims abstract description 3
- 230000005611 electricity Effects 0.000 claims description 11
- 238000002955 isolation Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 abstract description 22
- 230000001932 seasonal effect Effects 0.000 abstract description 5
- 230000035772 mutation Effects 0.000 abstract description 4
- 231100000350 mutagenesis Toxicity 0.000 abstract description 2
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
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Abstract
The utility model discloses a kind of frost zone thickness monitor device, including thickness of frozen earth layer monitoring electrode, monitoring auxiliary electrode, electric current and voltage sampling circuit, master control system and measurement power supply；Monitoring auxiliary electrode includes electric current auxiliary electrode and voltage auxiliary electrode；Electric current auxiliary electrode is passed through measurement power supply and is connected with the current channel of electric current and voltage sampling circuit, and voltage auxiliary electrode is connected on electric current and the voltage channel of voltage sampling circuit；Thickness of frozen earth layer monitoring electrode becomes insulation system and is arranged with outward multiple metal electrodes, and metal electrode is provided with the lead being connected with master control system；Electric current and voltage sampling circuit are connected in master control system；It passes through to measure earth's surface voltage, when measuring electric current pole exceedes frozen soil layer thickness, earth's surface voltage will produce mutation, by detecting this mutation, can determine whether that the profound degree of current flow is located at the interface of frozen soil layer and non-frozen soil layer, thus being calculated the thickness of Seasonal analysis.
Description
Technical field
This utility model is related to power ground systematic survey field and in particular to a kind of frost zone thickness monitor fills
Put.
Background technology
Because variation of ambient temperature is big, this region upper layer of soil is caused to there is seasonal freezeout, on upper strata after freezing
Form high soil resistivity layer in soil, and compared with non-freezing situation, the soil resistivity of this layer is in different season phases
Difference ten arrives hundreds times, thus causing ground network ground resistance very big in different calendar variations.The leading indicator of earth mat safety
For earth resistance, step voltage, contact voltage, soil freezing will result in earth resistance and rises, and earth resistance increase can cause ground
Net current potential rises, thus causing step voltage to increase with contact voltage, jeopardizes personnel and equipment safety.Therefore, monitor seasonality
The frozen soil layer thickness of Frozen Ground Area has safely very important meaning to guaranteeing substation operation.
The monitoring of frost zone thickness belongs to the category of overvoltage protection and ground connection.The type monitoring is there is no to set at present
Standby.
Utility model content
This utility model provides a kind of frost zone thickness monitor device to solve above-mentioned technical problem.
Imbed earthing pole and injection current in shallow surface, the current potential of earth's surface can therefore change.Electric current pole buried depth is located at
Soil boundary, maximum in the rate of change of voltage.When i.e. in the Soil structure of electric current pole embedment vertically apparent bearing layering,
In the case that injection current is constant, change the length of embedment of electric current pole, the distribution of surface potential can change.In electric current pole
When will cross soil boundary, maximum in the rate of change of surface potential.According to above-mentioned principle, this utility model provide with
Lower technical scheme：
A kind of frost zone thickness monitor device, including thickness of frozen earth layer monitoring electrode, monitoring auxiliary electrode, electric current and electricity
Pressure sample circuit, master control system and measurement power supply；Wherein：
Described monitoring auxiliary electrode includes electric current auxiliary electrode and 2 voltage auxiliary electrodes, described voltage auxiliary electrode bag
Include first voltage auxiliary electrode and second voltage auxiliary electrode；
Described electric current auxiliary electrode is passed through measurement power supply and is connected with the current channel of electric current and voltage sampling circuit, described electricity
Pressure auxiliary electrode is connected on electric current and the voltage channel of voltage sampling circuit；
Described thickness of frozen earth layer monitoring electrode becomes insulation system and is arranged with outward multiple metal electrodes, and described metal electrode sets
It is equipped with the lead being connected with master control system；
Described electric current and voltage sampling circuit are connected in master control system.
For the ease of the connection of lead, described thickness of frozen earth layer monitors the hollow pipe knot that electrode becomes the sealing of the one end open other end
Structure, its internal diameter is not less than 1 centimetre and no more than 2 centimetres, and thickness of pipe wall is not less than 2 millimeters, and described metal electrode is circlewise set in
Outside hollow pipe.
Described metal electrode is uniformly arranged on thickness of frozen earth layer monitoring electrode.
Using the device of this programme, when using, thickness of frozen earth layer monitoring electrode, monitoring auxiliary electrode are located at straight line
On, described thickness of frozen earth layer monitoring the distance between electrode and electric current auxiliary electrode are not less than 10 meters.Thickness of frozen earth layer monitoring electrode and
The distance between electric current auxiliary electrode however less than 10 times of thickness of frozen earth layer, and frost zone thickness is typically at 1 meter about.
Described voltage auxiliary electrode is positioned at the axis of thickness of frozen earth layer monitoring electrode and electric current auxiliary electrode and thickness of frozen earth layer
Between monitoring electrode, wherein, first voltage auxiliary electrode is located between thickness of frozen earth layer monitoring electrode and second voltage auxiliary electrode
And the distance monitoring electrode with thickness of frozen earth layer is not less than 10 times of first voltage auxiliary electrode diameter and no more than first voltage is auxiliary
Help electrode diameter 20 times.
It is straight that the spacing of described first voltage auxiliary electrode and second voltage auxiliary electrode is not less than first voltage auxiliary electrode
10 times of footpath.Thickness of frozen earth layer monitoring the distance between electrode and first voltage auxiliary electrode unsuitable excessive also should not be too small, not
It is optimal between 20 times of less than 10 times of first voltage auxiliary electrode diameter and no more than first voltage auxiliary electrode diameter, 10
Times first voltage auxiliary electrode diametral distance is voltage-sensitive section, and the electrode that thickness of frozen earth layer monitors electrode can be auxiliary to first voltage
The electrode helping electrode impacts, and measurement error is big, affects precision；And more than 20 times of first voltage auxiliary electrode diametral distances
Scope, its change in voltage is little.Electric current auxiliary electrode length of embedment is more deep better, and its depth is deeper, and resistance is less, and electric current is got over
Greatly so that certainty of measurement is higher.
Described monitoring auxiliary electrode is not less than 1 centimetre and the metallic rod not less than 20 centimetres for the length for diameter.
Using the device of this programme, when measuring to thickness of frozen earth layer, thickness of frozen earth layer monitors one end court of electrode opening
On, thickness of frozen earth layer monitoring electrode, first voltage auxiliary electrode, second voltage auxiliary electrode and electric current auxiliary electrode are located at one directly
Squeeze into successively in frozen soil on line；Thickness of frozen earth layer is monitored along being flushed with ground on the metal electrode of electrode the top, and opening is located at
More than ground and liftoff be no less than 20 centimetres and fixing.By adjusting the voltage of measurement power supply, to keep thickness of frozen earth layer monitoring electricity
Pole, electric current auxiliary electrode place loop electric current constant.During measurement, master control system controls the metal electricity of measurement power supply and the top
Pole is connected, and the voltage difference obtaining between first voltage auxiliary electrode and second voltage auxiliary electrode is UX, wherein, X represents
Pendulous frequency.When measuring for second, master control system controls measurement power supply to be connected with the metal electrode that position height is taken second place successively
Connect, and obtain the voltage difference between first voltage auxiliary electrode and second voltage auxiliary electrode.From the 4th time measurement start i.e. than
Relatively（UX-1-UX）、（UX-2-UX-1）With（UX-3-UX-2）Magnitude relationship, when（UX-1-UX）<（UX-2-UX-1）And（UX-3-UX-2）<
（UX-2-UX-1）When, the thickness D of frost zone earth is：D= Y *（X -1）- Y/2；Wherein, the unit of D be centimetre.Wherein, Y
For the distance between adjacent thickness of frozen earth layer monitoring electrode.
Preferably, described master control system includes main control module and the high-frequency signal collection mould being connected on main control module
Block, described high-frequency signal acquisition module is connected with voltage channel and current channel, and described voltage channel and current channel all wrap
Include the filter circuit being sequentially connected, AD converter, isolation module and memorizer；The signal output part of described memorizer is connected to height
In frequency signal acquisition module, the lead of described metal electrode is connected on main control module.This programme is on the basis of such scheme
Automatic measurement to thickness of frozen earth layer is realized by main control module, filter circuit, AD converter, isolation module and memorizer are right respectively
Voltage, current signal are filtered process, AD conversion, send into memorizer after anti-interference process, and high-frequency signal acquisition module is direct
Main control module is sent the data to, main control module is carried out to thickness of frozen earth layer according to data after data in memorizer is acquired
Judge.
This utility model compared with prior art, at least has such advantages as and beneficial effect：
This equipment passes through to measure earth's surface voltage, and when measuring electric current pole exceedes frozen soil layer thickness, earth's surface voltage will produce
Raw mutation, by detecting this mutation it can be determined that the profound degree of current flow is located at the interface of frozen soil layer and non-frozen soil layer, thus
It is calculated the thickness of Seasonal analysis.
Brief description
Accompanying drawing described herein is used for providing this utility model embodiment is further understood, and constitutes the one of the application
Part, does not constitute the restriction to this utility model embodiment.In the accompanying drawings：
Fig. 1 is this utility model structural representation.
Fig. 2 is the theory diagram of this utility model master control system.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage become more apparent, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, is not intended as to restriction of the present utility model.
Embodiment 1
A kind of frost zone thickness monitor device as shown in Figure 1, including thickness of frozen earth layer monitoring electrode, monitoring auxiliary electricity
Pole, electric current and voltage sampling circuit, master control system and measurement power supply；Wherein：
Described monitoring auxiliary electrode includes electric current auxiliary electrode and 2 voltage auxiliary electrodes, described voltage auxiliary electrode bag
Include first voltage auxiliary electrode and second voltage auxiliary electrode；
Described electric current auxiliary electrode is passed through measurement power supply and is connected with the current channel of electric current and voltage sampling circuit, described electricity
Pressure auxiliary electrode is connected on electric current and the voltage channel of voltage sampling circuit；
Described thickness of frozen earth layer monitoring electrode jacket is provided with metal electrode, described metal electrode is provided with and master control system phase
Lead even；
Described electric current and voltage sampling circuit are connected in master control system.
By this equipment measurably table voltage, when measuring thickness of frozen earth layer monitoring electrode exceedes frozen soil layer thickness,
Earth's surface voltage will produce mutation, by detecting this mutation it can be determined that current thickness of frozen earth layer monitors electrode depth is located at frozen soil
Layer and the interface of non-frozen soil layer, thus be calculated the thickness of Seasonal analysis.
Embodiment 2
The present embodiment optimizes on the basis of above-described embodiment, will thickness of frozen earth layer monitoring electrode become one end open and
The tubular structure of other end sealing, its internal diameter is not less than 1 centimetre and no more than 2 centimetres, and thickness of pipe wall is not less than 2 millimeters, described
Metal electrode is circlewise uniformly set in outside hollow pipe.
Described thickness of frozen earth layer monitoring the distance between electrode and electric current auxiliary electrode are not less than 10 meters.
Described voltage auxiliary electrode is positioned at the axis of thickness of frozen earth layer monitoring electrode and electric current auxiliary electrode and thickness of frozen earth layer
Between monitoring electrode, wherein, first voltage auxiliary electrode is located between thickness of frozen earth layer monitoring electrode and second voltage auxiliary electrode
And the distance monitoring electrode with thickness of frozen earth layer is not less than 10 times of first voltage auxiliary electrode diameter and no more than first voltage is auxiliary
Help electrode diameter 20 times.
It is straight that the spacing of described first voltage auxiliary electrode and second voltage auxiliary electrode is not less than first voltage auxiliary electrode
10 times of footpath.
Described monitoring auxiliary electrode is not less than 1 centimetre and the metallic rod not less than 20 centimetres for the length for diameter.
Embodiment 3
Now lift a detailed embodiment, as shown in figure 1, electrode A monitors electrode for thickness of frozen earth layer, electrode B assists for electric current
Electrode, electrode C and electrode D are respectively first voltage auxiliary electrode and second voltage auxiliary electrode.The structure of this device with above-mentioned
The structure of embodiment is identical.Metal electrode is circlewise uniformly set in outside hollow pipe, the distance between two neighboring metal electrode
It is set to 5 centimetres.More flat ground at one is selected to squeeze into two electric current poles in frozen ground regions to be measured, i.e. electrode A and electricity
Pole B, two 20 meters of electric current die openings.Control measurement power supply so as to place loop current is constant；
Electrode C and electrode D is squeezed on the line between electrode A and electrode B, the distance of electrode C to electrode A is 0.5 meter；
The distance of electrode D distance electrode A is 1.5 meters, and electrode C and electrode D places into the soil depth for 5 centimetres；The electrode C that master control system obtains
Voltage difference and electrode D between is respectively U1=38.8V, U2=36.5V, U3=34.8V, U4=32.4V, U5=29.5V, U6=16.6V,
U7=14.4V.U1-U2=2.3V, U2-U3=1.7V, U3-U4=2.4V, U4-U5=2.9V, U5-U6=12.9V, U6-U7=2.2V.
By comparing the first seven measurement result, find（U6-U7）<（U5-U6）And（U4-U5）<（U5-U6）When, using following formula meter
Calculate the thickness D of upper layer of soil：D=5 ×（7-1）-2.5=27.5cm ；
Now D is the thickness of Seasonal analysis, and error is ± 2.5cm.
Embodiment 4
The present embodiment optimizes on the basis of above-described embodiment, master control system is optimized, to realize to jelly
The automatic detection of soil thickness.Specifically, described master control system includes main control module and the high-frequency signal being connected on main control module
Acquisition module, described high-frequency signal acquisition module is connected with voltage channel and current channel, and described voltage channel and electric current lead to
Road all includes filter circuit, AD converter, isolation module and the memorizer being sequentially connected；The signal output part of described memorizer is even
It is connected on high-frequency signal acquisition module, the lead of described metal electrode is connected on main control module.
High-frequency signal acquisition module adopts FPGA chip, is multi-functional, low-power consumption module, the height of responsible control data
Speed collection and storage.
AD converter is mainly AD conversion chip, and by the analog voltage signal collecting, rapid translating becomes digital signal,
In case storage and transmission.
Main control module can adopt ARM11 chip, and it is high-performance, low cost, the Embedded ARM process of low-power consumption
Device, carries out monitor in real time to each component working voltage.Specifically, network interface can be connected on main control module, USB, display connect
Mouthful etc., network interface is realized netting twine and is connected computer, display gathers in real time waveform and parameter；USB can derive collection number by USB flash disk
According to；Display interface, connects display device, the information such as display system parameter and collection waveform.
Above-described specific embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect
One step describes in detail, be should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit
Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, equivalent replaces
Change, improve, should be included within protection domain of the present utility model.
Claims (8)
1. a kind of frost zone thickness monitor device is it is characterised in that include thickness of frozen earth layer monitoring electrode, monitoring auxiliary electricity
Pole, electric current and voltage sampling circuit, master control system and measurement power supply；Wherein：
Described monitoring auxiliary electrode includes electric current auxiliary electrode and 2 voltage auxiliary electrodes, and described voltage auxiliary electrode includes the
One voltage auxiliary electrode and second voltage auxiliary electrode；
Described electric current auxiliary electrode is passed through measurement power supply and is connected with the current channel of electric current and voltage sampling circuit, and described voltage is auxiliary
Electrode is helped to be connected on electric current and the voltage channel of voltage sampling circuit；
Described thickness of frozen earth layer monitoring electrode becomes insulation system and is arranged with outward multiple metal electrodes, and described metal electrode is provided with
The lead being connected with master control system；
Described electric current and voltage sampling circuit are connected in master control system.
2. a kind of frost zone thickness monitor device according to claim 1 it is characterised in that：Described thickness of frozen earth layer prison
Survey the tubular structure that electrode becomes the sealing of the one end open other end, its internal diameter is not less than 1 centimetre and no more than 2 centimetres, thickness of pipe wall
Not less than 2 millimeters, described metal electrode is circlewise set in outside hollow pipe.
3. a kind of frost zone thickness monitor device according to claim 1 it is characterised in that：Described metal electrode is equal
The even thickness of frozen earth layer that is arranged on is monitored on electrode.
4. a kind of frost zone thickness monitor device according to claim 1 it is characterised in that：Described thickness of frozen earth layer prison
Survey the distance between electrode and electric current auxiliary electrode and be not less than 10 meters.
5. a kind of frost zone thickness monitor device according to claim 1 it is characterised in that：Described voltage auxiliary electricity
Pole is located at thickness of frozen earth layer monitoring electrode and the axis of electric current auxiliary electrode and thickness of frozen earth layer is monitored between electrode, wherein, first
Voltage auxiliary electrode is located at thickness of frozen earth layer and monitors between electrode and second voltage auxiliary electrode and monitor electrode with thickness of frozen earth layer
20 times of distance not less than 10 times of first voltage auxiliary electrode diameter and no more than first voltage auxiliary electrode diameter.
6. a kind of frost zone thickness monitor device according to claim 5 it is characterised in that：Described first voltage is auxiliary
The spacing helping electrode and second voltage auxiliary electrode is not less than 10 times of first voltage auxiliary electrode diameter.
7. a kind of frost zone thickness monitor device according to claim 1 it is characterised in that：Described monitoring auxiliary electricity
Extremely diameter is not less than 1 centimetre and the metallic rod not less than 20 centimetres for the length.
8. a kind of frost zone thickness monitor device according to claim 1 it is characterised in that：Described master control system bag
Include main control module and the high-frequency signal acquisition module being connected on main control module, described high-frequency signal acquisition module is connected with electricity
Filter circuit that pressure passageway and current channel, described voltage channel and current channel all include being sequentially connected, AD converter, isolation
Module and memorizer；The signal output part of described memorizer is connected on high-frequency signal acquisition module, the drawing of described metal electrode
Line is connected on main control module.
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| CN201621073276.3U CN206002050U (en) | 2016-09-23 | 2016-09-23 | A kind of frost zone thickness monitor device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655395A (en) * | 2017-11-14 | 2018-02-02 | 成都六惠科技有限公司 | wall thickness monitoring device and system |
| CN107702635A (en) * | 2017-11-14 | 2018-02-16 | 成都六惠科技有限公司 | Wall thickness monitoring method and device |
| CN107957593A (en) * | 2017-12-19 | 2018-04-24 | 中国民航大学 | A kind of Thick Underground Ice degeneration monitoring system and control evaluation method |
| CN109900548A (en) * | 2019-03-22 | 2019-06-18 | 崔凯 | A kind of low temperature frozen soil triaxial apparatus |
| CN112882103A (en) * | 2021-01-22 | 2021-06-01 | 中煤建设集团有限公司 | Method for detecting thickness of frozen soil curtain of urban underground large-scale freezing project |
| CN113111531A (en) * | 2021-04-23 | 2021-07-13 | 中国水利水电科学研究院 | Distributed hydrological model-oriented frozen soil layer thickness simulation method for seasonal frozen soil area |
-
2016
- 2016-09-23 CN CN201621073276.3U patent/CN206002050U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655395A (en) * | 2017-11-14 | 2018-02-02 | 成都六惠科技有限公司 | wall thickness monitoring device and system |
| CN107702635A (en) * | 2017-11-14 | 2018-02-16 | 成都六惠科技有限公司 | Wall thickness monitoring method and device |
| CN107957593A (en) * | 2017-12-19 | 2018-04-24 | 中国民航大学 | A kind of Thick Underground Ice degeneration monitoring system and control evaluation method |
| CN107957593B (en) * | 2017-12-19 | 2019-07-02 | 中国民航大学 | A kind of Thick Underground Ice degeneration monitoring system and control evaluation method |
| CN109900548A (en) * | 2019-03-22 | 2019-06-18 | 崔凯 | A kind of low temperature frozen soil triaxial apparatus |
| CN109900548B (en) * | 2019-03-22 | 2020-12-11 | 崔凯 | Low-temperature frozen soil triaxial apparatus |
| CN112882103A (en) * | 2021-01-22 | 2021-06-01 | 中煤建设集团有限公司 | Method for detecting thickness of frozen soil curtain of urban underground large-scale freezing project |
| CN113111531A (en) * | 2021-04-23 | 2021-07-13 | 中国水利水电科学研究院 | Distributed hydrological model-oriented frozen soil layer thickness simulation method for seasonal frozen soil area |
| CN113111531B (en) * | 2021-04-23 | 2021-10-22 | 中国水利水电科学研究院 | Distributed hydrological model-oriented frozen soil layer thickness simulation method for seasonal frozen soil area |
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